DeleD Community Edition

Jeroen · Posted: Sun Oct 25, 2009 9:38 am Post subject:

I was wondering: will merging UV edges be made possible in your plugin?
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chronozphere · Posted: Sun Oct 25, 2009 10:43 am Post subject:

I am not sure what you mean. Please elaborate. Smile

Jeroen · Posted: Sun Oct 25, 2009 12:17 pm Post subject:

The exact functionality is unclear to me, to be honest, but we talked about this a while ago. It's a matter of implementing it in the plugin or within DeleD itself. I believe the idea was to implement this in the plugin. Just wanted to make sure. Smile

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chronozphere · Posted: Sun Oct 25, 2009 10:42 pm Post subject:

Lol, It's quite hard to answer this question if I don't know what we are talking about. Laughing

Do you mean an "edge weld" tool that allows the user to connect edges of different polygons to make neat UV maps?
If I implement such a feature, it would work like the "average" tool for vertices in DeleD. Edges will seem welded, until you move their polygons.

chronozphere · Posted: Sun Feb 28, 2010 12:40 pm Post subject:

I started working on NashaUV again. Very Happy

This time, I'm going to add an options dialog:

I'm also planning to add planar mapping.
Hopefully, I can get those two things working before the next DeleD release, so it can be included. Smile

Edit: Just noticed that the labels in the lowest group box are wrong. They should be Polygon color, Selected polygons etc... Smile

Grandmaster B · DeleD PRO user Joined: 03 Jul 2007 Posts: 218

chronozphere · Posted: Sat Mar 20, 2010 11:53 am Post subject:

The whole options window is finished. I'm now working on the mapping modes. This is alot of work because I have to make good 3d gizmo's which requires some tricky math. Also the mapping process itsself is a challenge.

However, the mapping gizmo's/dummies are done. This is the dummy I use for cylinder mapping. The texture is wrapped around the object like toilet paper. Smile

Also, only the selected polygons will be affected (not the entire primitive). This will make the mapping tools very powerfull.

It will probably take me a few more weeks to complete this.

chronozphere · Posted: Wed Mar 24, 2010 12:24 am Post subject:

Rotation gizmo is done! Very Happy

This gizmo will be used to transform the mapping dummy (plane, cylinder or sphere).

You just click on a disc and drag. A very effective way to rotate something in a 3d viewport. Cool

DeleD should have one of these too. Razz

paul_nicholls · Posted: Wed Mar 24, 2010 1:30 am Post subject:

ridwan sameer · DeleD PRO user Joined: 27 Jun 2008 Posts: 108

See now... i already like you for this....

But if someone made a tutorial... ill LOVE you BOTH Laughing

chronozphere · Posted: Wed Mar 24, 2010 8:47 am Post subject:

paul_nicholls · Posted: Wed Mar 24, 2010 9:27 am Post subject:

chronozphere · Posted: Wed Mar 24, 2010 12:15 pm Post subject:

Well, the true problem of implementing UV-unwrapping is that you need a good algorithm to turn a 3d mesh into a 2d one. This must be done in such a way that the triangles are nicely distributed over the plane and that there are almost no seams. Like this:

It's like peeling an orange and laying the shell on the table. There are sophisticated algorithms to do this.

http://www.gamedev.net/community/forums/topic.asp?topic_id=517834

The method shown in the demo is not unwrapping, but projection. That's like smashing the orange with a sledgehammer. Laughing

It just flattens the whole thing without considering optimal distribution/seams etc..
I allready knew how to do that (and fik has made a projection plugin that does that).

Hope this clears things up. Smile

AWM Mars · Posted: Wed Mar 24, 2010 1:23 pm Post subject:

Is this the sort of thing you mean http://en.wikipedia.org/wiki/Parametric_surface

or this http://en.wikipedia.org/wiki/UV_mapping

I found that Blender does UV Unwrapping.. but given the choice of using Blender and living, I choose life..
This is a dedicated programme, if you want to spend money http://www.unwrap3d.com/u3d/index.aspx

This may prove useful http://alice.loria.fr/index.php/publications.html?redirect=0&Paper=lscm@2002&image=5

and http://www.pullin-shapes.co.uk/page8.htm
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chronozphere · Posted: Wed Mar 24, 2010 2:03 pm Post subject:

Yeah.. I was just looking at those articles. Smile

They are very mathy and scientific. I go to university so I hope I will be able to read this stuff at some point. Because "Least square conformal maps" looked a bit too difficult, i turned to "Angle based flattening" (Still very hard).

http://www.cs.ubc.ca/~sheffa/papers/abf_plus_plus.pdf

At some point they mention "Lagrange multipliers", so I started studying this:

http://en.wikipedia.org/wiki/Lagrange_multipliers#Very_simple_example

I basicly understand that now, but I'm still lightyears away from a working UV-unwrapping implementation. Sad

@AWM mars: This is the feature that should give you nice smooth and uniform surfaces.

Hope I can understand this someday.